[PATCH] * Avoid potential out-of-bounds read, due to incorrect checking.

[Joshua Rogers]

* mpi/mpiutil.c (_gcry_mpi_const): Check 'no' against =>
MPI_NUMBER_OF_CONSTANTS to avoid a potential out-of-bounds read
--

Signed-off-by: Joshua Rogers <git at internot.info>
---
 mpi/mpiutil.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mpi/mpiutil.c b/mpi/mpiutil.c
index f74dd91..0a833d2 100644
--- a/mpi/mpiutil.c
+++ b/mpi/mpiutil.c
@@ -690,7 +690,7 @@ _gcry_mpi_get_flag (gcry_mpi_t a, enum gcry_mpi_flag flag)
 gcry_mpi_t
 _gcry_mpi_const (enum gcry_mpi_constants no)
 {
-  if ((int)no < 0 || no > MPI_NUMBER_OF_CONSTANTS)
+  if ((int)no < 0 || no >= MPI_NUMBER_OF_CONSTANTS)
     log_bug("invalid mpi_const selector %d\n", no);
   if (!constants[no])
     log_bug("MPI subsystem not initialized\n");
-- 
1.9.1